Assembly type laminated slab and composite beam connecting structure and construction method

Abstract

The invention provides an assembly type laminated slab and composite beam connecting structure and a construction method. The assembly type laminated slab and composite beam connecting structure comprises a laminated slab and a composite beam, wherein the laminated slab comprises a prefabricated layer and a post-pouring layer, the prefabricated layer comprises a prefabricated bottom plate and a plurality of shear reinforcements, the bottom ends of the shear reinforcements are anchored on the prefabricated bottom plate, the top ends of the shear reinforcements are exposed, the composite beam comprises a steel beam and a plurality of high-strength bolt sets detachably connected to the surface of the steel beam, the bottom face of one side of the prefabricated layer is placed on the surface of the steel beam, a splicing seam between the steel beam and the prefabricated layer is filled with post-pouring concrete on the prefabricated bottom plate, and the high-strength bolt sets are anchored in the post-pouring concrete at the splicing seam. The construction method of the assembly type laminated slab and composite beam connecting structure comprises the steps that S1, the prefabricated layer is produced; S2, the composite beam is installed, hoisted and positioned, and the prefabricated layer is hoisted and placed on the steel beam; and S3, surface layer steel bars are laid, and post-pouring concrete is poured to fill an abutted seam between the steel beam and the prefabricated layer. The connecting structure of the laminated slab and the composite beam is reliable in stress, the steel beam can be replaced, and construction is convenient.

Description

technical field [0001] The invention belongs to the technical field of prefabricated buildings, and in particular relates to a connection structure between prefabricated laminated slabs and composite beams and a construction method thereof. Background technique [0002] Compared with cast-in-place slabs, laminated slabs have the advantages of less on-site formwork, high production efficiency, low environmental pollution, and fast construction speed. However, the laminated floor slab also has obvious disadvantages. The rigidity of the prefabricated floor slab is small, and it is easy to crack during hoisting and transportation, which greatly limits its application. In view of this, the reinforced truss laminated slab proposed by the Chinese patent CN201320114445.3 overcomes the above-mentioned shortcomings of the laminated floor slab, but has the following disadvantages: the amount of truss reinforcement is large, which only improves the rigidity of the prefabricated slab. T...

AI Technical Summary

Problems solved by technology

However, the laminated floor slab also has obvious disadvantages. The rigidity of the prefabricated floor slab is small, and it is easy to crack during hoisting and transportation, which greatly limits its application.

In view of this, the reinforced truss laminated slab proposed by the Chinese patent CN201320114445.3 overcomes the above-mentioned shortcomings of the laminated floor slab, but has the following disadvantages: the amount of truss reinforcement is large, which only improves the rigidity of the prefabricated slab. The impact on performance is small, the waste of steel bars is serious, and the cost is also greatly increased

Chinese patent CN201620040756.3 proposes a laminated slab with concrete ribs. Although it can effectively improve the stiffness of the prefabricated floor, the connection between the floor and the ribs is relatively complicated, and the production of the laminated slab requires secondary pouring. brings difficulties

During the construction of traditional composite beams, the concrete slabs are often cast-in-place construction methods, but this method requires complex formwork installation and removal on site, and the construction efficiency is low, and the environmental pollution is relatively large

Chinese patent CN201920120142.X proposes a laminated slab composite beam, but it has the following disadvantages: the rigidity of the prefabricated slab is small, and the prefabricated slab is easy to crack during transportation and hoisting

Patent CN201910072931.5 is also a laminated slab composite beam. The prefabricated slab is provided with truss reinforcement. The truss reinforcement can be simplified as a rib on the prefabricated slab, which can effectively improve the rigidity of the prefabricated slab and greatly reduce the prefabricated slab. The risk of cracking during transportation and hoisting; but there are problems: the amount of truss reinforcement is very large, which has little impact on the mechanical performance of the composite beam after the laminated layer is poured, the waste of reinforcement is serious, and the cost is also greatly increased

Images